Lithium concentrations and isotopic compositions of coexisting olivine and clinopyroxene (cpx) in well-characterized peridotite xenoliths from Tok (SE Siberian craton) and samples from two other far-east Russian localities reveal strong elemental and isotopic disequilibria, which correlates with bulk rock composition. Lithium concentrations in cpx from Tok (1–12 ppm) are equal to or significant...

This study investigates the effects of variations in the relative fugacities of oxygen and sulfur on the wetting of mantle olivine by molten sulfide. Experiments were performed on mixtures of San Carlos olivine and synthetic FeS at 1 bar and 1350oC. Crucibles were fabricated from San Carlos olivine, and the fugacities of oxygen and sulfur were controlled by mixing CO2, CO, and SO2 gases. Experi...

[1] Densities and elastic properties of solid natural spineland garnet-peridotite samples (n = 133) at standard temperature (T ) and pressure (P) (STP) conditions were calculated for compositions ranging from Mg# (100 Mg/(Mg + Fe)) of 86–94. The physical properties were used to investigate how natural compositional variations control density and seismic velocity. A corresponding set of composit...

Ophiolite magnesite deposits are among the main sources of magnesite, a raw material critical for EU. The present work focuses on occurrences at Kymasi (Evia Island, Greece), in close spatial association with chromitite within same peridotite massif, and relationship between ultramafic rocks late veins. Chromitite lenses hosted dunite, contact partially serpentinized cut by Close to veins, show...

Post-collision Pliocene-Quaternary basaltic rocks outcrop in the Kerman Cenozoic Magmatic Arc (KCMA) to northwest and east of Shahr-e-Babak city. These porphyritic vesicular are composed essentially clinopyroxene, olivine, plagioclase. basalts display alkaline affinity negative Ta, Zr, Rb anomaly, but slightly Nb relative elements with similar compatibility, positive Ba, K, Sr suggesting their ...

Abstract The magmatic character of early subduction zone and arc development is unlike mature systems. Low-Ti-K tholeiitic basalts boninites dominate the Izu-Bonin-Mariana (IBM) system. Basalts recovered from Amami Sankaku Basin (ASB), underlying located west IBM’s oldest remnant arc, erupted at ~49 Ma. This was 3 million years after inception (51-52 Ma) represented by forearc basalt (FAB), tip...